A 15-year-old girl is attempting to hike the entire 2,100-mile length of the Appalachian Trail to become the youngest person ever to hike the trail — from Georgia to Maine — alone. And, as of Wednesday, she is nearly there.

Neva Warren of Spring Hill, Fla., began her trip at the trail's southern end in Georgia on April 1 and followed the trail north through Georgia, the Carolinas, Tennessee, Virginia, Maryland, Pennsylvania, New Jersey, New York, Vermont, Connecticut, Massachusetts and the White Mountains of New Hampshire, according to the Bangor Daily News.

On Wednesday, she had about 15 miles to go to Mount Katahdin, the northern end of the 2,200-mile white-blazed trail in Maine, the Associated Press reported. After reaching the peak, she was going back to another part of Maine to hike a 100-mile stretch that she passed over earlier.

Warren, who goes by the trail nickname "Chipmunk," celebrated her 15th birthday while passing through Virginia in June. While she hikes the trail alone, her parents, Tammy and Jay Warren, follow her in a camper dubbed the "Chip Mobile," and use a GPS device to track her movements, according to the Bangor Daily News.

Warren, who hadn't done a lot of backpacking before the Appalachian Trail, reportedly got off to a rough start. ""On the first day, I rolled my left ankle," she told the Herald-Tribune. "On the second day, I rolled my right ankle. On the third day, I got new boots."

The Herald-Tribune reported that Warren averages about 13 miles a day on the Appalachian Trail, and sometimes hikes 20 miles.

About 1,800–2,000 people attempt to “thru-hike” the Appalachian Trail every year, according to the Appalachian Trail Conservancy. Only 1 in 4 who attempt a thru-hike successfully completes the journey, taking an average of six months.